Question

Explain the drawing of the homunculus. Why are the areas such as the lips and hands larger than the other areas

Answer 1

Sensation and movement of different parts of the body are controlled by different areas of the brain.For instance, when you move your index finger, a specific area on the top of your brain triggers a signal that tells the muscles on your index finger to move.  When you touch something with your index finger, a neighboring area of your brain receives a signal about that touch sensation.